Control device



Jan. 10, 1950 R. J. SCHEIDT 2,494,410

CONTROL DEVICE Filed Oct. 15, 1947 2 Sheets-Sheet l @fflm Jan. 10, 1950 R. J. SCHEIDT 2,494,410,

CONTROL DEVICE Filed Oct. 15, 1947 2 Sheets-$heet 2 6032 61 J. SCHEIDT,

Patented Jan. 10 195 0 umreo PATENT OFFICE wee-c common. DEVICE; Robert J; seheiat, California, Mo. Application 0.ctob.en=13-, 1947-, Serial No. 779,582 4 Cla ms. 01... 1.9.2.0.2)

Thepresent invention relatesto controldevice and. more. particularly has. referencet alinkage device for controlling the-operation of a power hammer or the like.

More specifically; my invention comprises a line lit-llv of Figure 1,. looking; in the direction, of

linkage mechanism, connected with the control switch for the power plant and also with: the

clutching mechanism which, in its inoperative position, maintains the circuit. opened to the power plant, and the clutch faces. disengaged.

Upon actuation of the; linkage h iO h actuated member; the, switch; is ma-nipuln ied. to close the circuit to the power-plant and .simul taneously the clutch becomes efi et ve whereby the hammer is rendered operative. Upon re;- lease of pressure from the ,foot actuated: means; th linka e is r turned; to. its init al. position; thereby opening the circuit to the power plant and disconnecting: the. clutching; mechanism.

An object of my. inyentionisto provide .alinkr a rra ment. whichmav be; incorporated with conventional power hammers.- for controlling the operation. of the power hammer.

And a. fut heirobje t:v ofvmy inventi n is llQPIzQe vide a linkage arrangement. of they character de, scribedwherein actuation of the linkage simule taneously rendersthe-motor and clutching mech anisms operative.

Yet a. further object, of myi-nvention is to proid a n a dev ce of the character described which may be easily operatedrby footpressure.

Yet a further object is to. provide a linkage mechanism for controlling the operation of a power hammer which issimple, in structuraltde tails, positive in operaliion.v and which can be. cheaply and easily manufactured.

With. the'foregoing and other objects in-view, the invention consists-in; thev details: or construca tion, and in the arrangement. and: combination of parts to. be hereinaftermere fully set forth and claimed.

In describing the inventionin detail reference; will be hadto theaccompailving drawings-term, ing part of this application, wherein. like char,- acters denote corresponding parts the several views, and in which:

Figure 1 is a view in side elevationof; mynlinlg age construction showing itsrelationshi-p to a. power hammer of conventional type.

Figure 2 is a view in perspective oi the: come.-

ponent parts of my linkage control.

F gure 3 is a sectional v ew ta en long he line 33. of Figure blocking-in he dir ctiona itthe arrows.

the arrows, and

ure- 5 is a. sectional View taken along the line 5-5 ofiFigure I, looking in the direction of theiarrows;

Referringtov Figure l, I have shown a. power hammer ID. of: conventional structure, wherein an electric motor ,ll drives shaft l.2- through upper and lower pplleysl3 and [4: by an endless belt [5. A. sliding clutch collar l6. cooperates with a fixed collar I1 associated. with the pulley l3. for rotating the shaft t2. Electrical leads. [8. supply currentto. the motor H, andxa switch I 9 mounted on, the frame of'the, power hammer I0 controls the; flow-of current to. the electric motor.

As; above pointed out, my invention is directed a linkage control. for operating the switch [9 and the movable clutch collar 16" and this linkageI have designated generally 20, as shown in E ure 2.-

Referring to Figure 1, it will: be observed that a foot treadle 2] is pivoted to. an angle bracket 22; supported bythe frame or the hammer I 0, as shown at 23. The opposite orfree end of the foot tlteadlellis preferably arcuate in configuration and partially encircles. that part of the hammer H] which supportsthe. anvil. It will be appreciated: that by thus forming the free end 24 of the treadle, it may be readily actuated by the operator regardless of the location of theoperator with respectto the hammer. A helical spring 25. has its. lower end removably afiixed to the treadle 21., as shown at 26, and the upper end securedto an eye bolt or the like 27 The upper threaded end of the eye bolt 2-! threadedly engages an aperture provided in an angle 28 which is bolted or otherwise secured to the frame of the hammer. liocknutsiamaintain the eyebolt inproper positionwith respect to the angle 28 and by proper manipulation of these bolts, the Spring 25; may beadjusted within very fine limits. Normally, the spring- ,25 holds the foot treadle 2-lin the position-shown in Figure I or moves it up- Ward-ly-about its point of'pivot 23.

A secondeye bpltv ilk-is. detachably connected to; the, treadle 21. adjacent the spring 25 and is adjustably secured: to thelower end of an elongated link 3I by a, pair of lock nuts 32. As perhaps best,- shown in Figures I and 2, the elonated link"3.l is. bent. at a slight. angle, shown at 33, and a. bracket 3.4; is secured thereto. at a point.

and terminates in a vertical? extension 31. The Figure 4 is a sectional. view taken along the 5g bracket 34 is likewise inclined outwardly, as shown at 38 and terminates in a vertical portion 39 which is in parallel relation to the vertical extension 31. Pivotally connected to the extensions 31 and 39 are parallel links 40 and 4| which in turn are pivoted, as shown at 42, to a pair of connectors 43 and 44. The connectors 43 and 44 are attached to the frame of the hammer in any convenient manner.

Also pivoted to the extension 3'! and the vertical portion 39 are a pair of forwardly extending links 45 and 46 to which is secured an inverted U- shaped strap 41 adjacent the free ends of the links. The links are suitably attached to the sliding. clutch collar I6, as shown at 48. become more fully apparent, downward movement of the elongated link 3| will move the point of pivoting of the links 40, 4|, 45 and 46 down ing a sliding movement of the clutch collar l6 whereby it will engage the fixed clutch collar H to render said clutch mechanism operative.

As shown in Figures 2 and 4, an angle bracket 49 is suitably secured to the link 3| immediately above the bend 33. A bolt 50 is adjustably mounted in the flange of the bracket 49 by adjusting nuts The upper end of the bolt 50 is connected with a horizontally disposed lever 52 which is pivotally mounted to the frame of the hammer on a bracket 53, as shown at 54. The free end of the lever 52 is suitably connected with the switch mechanism to move such switch mechanism from its off and on positions.

With the linkage in the position shown in Figure 1, it will be appreciated that the clutch faces 16 and I! are disengaged and the switch l9 mm the off position. The parts will thus remain as long as pressure is not applied to the treadle 2| by virtue of the spring which tends to pull the treadle upwardly about its pivot point 23 to the frame. When it is desired to operate the hammer, the operator depresses the treadle 2| against the action of the spring 25, and the downward movement of the treadle will likewise effect a downward movement of the elongated link 3|.

This downward movement of the link 3| will cause 45 a pivotal movement of the lever 52 about its pivot point 54, thereby actuating the switch Hi to start the motor At the same time the pivot point of the links and 4| and and 45 to the link 3| will be displaced downwardly, thereby moving these links to an approximately horizontal position which moves the clutch collar |B into engage-' ment with the clutch face l1, whereby the hammer is caused to drop. Manifestly, upon release of foot pressure from the treadle 2|, the spring 25 55 obvious that considerable time and power is saved 0 As will later' switching means, and spring means normally maintaining said treadle in a position whereby said elongated arm, parallel links and lever maintain the movable clutch face out of engagement with the fixed clutch face and the switching means in the off position.

2. In a control device for hammers having an electric motor, switching means therefor, and wardly, thus straightening the links and effect-'2 fixed and movable clutch faces, a frame, a foot treadle pivoted to the frame, an elongated arm pivotally connected at its lower end of the treadle, a bracket attached to the arm adjacent the upper end thereof and extending outwardly at an angle therefrom and terminating in an extension parallel to the upper end of the arm, a pair of parallel links pivotally attached tothe upper end of the arm and the extension on the bracket, the free ends of said links being attached to the movable clutch face, a lever pivoted to the frame and having one endremovably secured to the elongated arm and the opposite end connected with the switching means, and a spring having one end thereof attached to the foot treadle and the other end thereof secured to an adjustable bolt mounted on the frame, said spring being adapted to maintain the treadle in a position whereby the elongated arm, parallel links and lever maintain the movable clutch face out of engagement with the fixed clutch face and the switching means in the ofi position.

3. In a control device for hammers having an electric motor, switching means therefor, and fixed and movable clutch faces, a frame, a foot treadle pivoted to the frame, an elongated arm connected at its lower end to said treadle, a bracket attached to the arm and extending outwardly at an angle therefrom and terminating in an extension parallel to the upper end of the arm, a pair of parallel links pivotally attached to the upper end of the arm and the extension on the bracket, the free ends of said links being attached to the movable clutch face, a lever pivoted to the in the operation of the machine. In addition, the z the clutch collar l6 and the switch I9 is not complex in detail, which, of course, reduces to a minimum the cost of manufacture and any repair or replacement which may be required.

I claim:

1. In a control device for hammers having an' electric motor, switching means therefor, and fixed and movable clutch faces, a frame, a foot treadle pivoted to the frame, an elongated arm pivotally connected at its lower end to the treadle,

frame, an adjustable connection between one end of said lever and the elongated arm, means connecting the opposite end of said lever with the switching means, and spring means normally maintaining said treadle in a position whereby said elongated arm, parallel links and lever maintain the movable clutch face out of engagement with the fixed clutch face and the switching means in the off position.

4. In a control device for hammers having anto the movable clutch face, a lever pivoted to theframe, an adjustable connection between one end of said lever and the elongated arm, means cona bracket attached to the arm adjacent the upper necting the opposite end of said lever with the switching means, an adjustable bolt mounted on REFERENCES CITED said frame, a spring having one end attached to said adjustable bolt and the opposite end to said treadle to maintain the treadle in a position The following references are of record in the file of this patent:

whereby the elongated arm, parallel links and 5 UNITED S A S PATENTS lever maintain the movable clutch face out of en- Number Name Date gagement with the fixed clutch face and the 696,973 Holmes APR 3 1902 switching means in the ofi position. 1' Krawitzky Sept 13, 1904 854,050 Marx May 21, 1907 ROBERT SCHEIDT- 10 9 3138 Golden July 5, 1910 1,378,146 Taigman May 17, 1921 1,775,038 Herron Sept. 2, 1930 1,953,230 Hollander Apr. 3, 1934 

